Liquid Particle Counter LLPC-T2021

Introduction

Liquid Particle Counter is used for detecting the size and quantity of solid particles in liquids by the principle of the light blocking method. It can measure the pollution levels and insoluble particles solid particles in oil samples. Its desktop design offers less space consumption for in small working space. The counter is easy to calibrate and offers great accuracy and can meet the standard requirement. Additionally, it configures high-performance large-sized particle counting sensors. Our particle counter supports an industrial computer Windows system allows instrument control and calculation.

This analytical equipment is designed to meet the rigorous requirements of modern laboratory operations, ensuring high precision, reliability, and ease of use for various experimental applications.

Applications

The Liquid Particle Counter is designed to detect the size and quantity of solid particles in liquids by the principle of the light blocking method. Our particle counter supports an industrial computer Windows system allows instrument control and calculation.

Specifications

Light Source	Semiconductor laser
Particle Size Range	1～100 μm or 4～70 μm
Detection Channels	32 pieces, can be 0.01μm interval arbitrary set particle size
Sensitivity	1μm or 4μm
Resolution	Better than 10%
Sample Detection Viscosity	< 650 cSt
Sampling Volume	0.3 ~ 100ml, 0.1ml interval
Sampling Accuracy	± 41/2 rating
Sampling Speed	5 ~ 60 ml/min
Power Supply	220 V ± 10％，50 Hz；180 W
Dimensions (L×D×H)	355 × 400 × 620 mm
Net Weight	19 kg

Features

Highly accurate 

Different Calibration options for sample type 

Computer connectivity

Display screen

User-friendly

FAQs

1. What types of oils and fluids can the Liquid Particle Counter analyze?

Liquid Particle Counter is designed to test a wide range of oils and fluids, including hydraulic oils, lubricating oils, turbine oils, and synthetic fluids used in various industries such as aviation, power generation, and manufacturing. It handles fluids with viscosity up to approximately 320 cSt. For higher viscosity samples, pre-heating or dilution may be required. Ensuring the fluid is free of air bubbles and moisture is important for accurate and consistent particle measurement results.

2. What cleanliness standards does the Liquid Particle Counter support?

Liquid Particle Counter supports major oil cleanliness standards such as 4406, 1638, AS4059, and 420, which are commonly used in industrial and military applications. It reports contamination levels by counting particles in different size ranges, typically from 4 microns up to 100 microns. The results are displayed either as absolute particle counts or as standard cleanliness codes, helping users interpret contamination levels and decide on maintenance or oil replacement actions.

3. Does the Liquid Particle Counter require sample dilution or pre-treatment?

For low-viscosity oils, Liquid Particle Counter can usually test the sample directly without dilution. However, for high-viscosity or heavily contaminated oils, pre-treatment steps such as heating, dilution with a compatible solvent, or vacuum degassing may be needed to ensure smooth sample flow and accurate particle detection. These preparations help eliminate air bubbles and ensure that the instrument provides reliable and repeatable readings, especially in samples that are dark or prone to foaming.

4. How is the Liquid Particle Counter maintained and calibrated?

Routine maintenance of the Liquid Particle Counter includes cleaning the sample path and flushing the system regularly to prevent clogging and contamination, especially after testing dirty or viscous oils. Calibration is typically done using 11171-certified calibration fluids to ensure the optical system remains accurate. Users are advised to perform verification checks periodically using standard reference fluids. The built-in software assists with calibration alerts and maintenance schedules, supporting consistent performance and reliable cleanliness data.

5. What is the working principle of the Liquid Particle Counter ?

Liquid Particle Counter uses the light blockage method, where a laser beam shines through the oil sample and particles passing through block the light. Each interruption is detected and measured, allowing the instrument to count and size the particles accurately. This method provides precise contamination analysis and supports rapid testing of oils and fluids. It is widely used for monitoring oil cleanliness in accordance with standards such as 4406, 1638, and AS4059.